| 1 | /* |
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| 2 | * Hydrogen |
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| 3 | * Copyright(c) 2002-2008 by Alex >Comix< Cominu [comix@users.sourceforge.net] |
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| 4 | * |
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| 5 | * http://www.hydrogen-music.org |
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| 6 | * |
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| 7 | * This program is free software; you can redistribute it and/or modify |
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| 8 | * it under the terms of the GNU General Public License as published by |
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| 9 | * the Free Software Foundation; either version 2 of the License, or |
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| 10 | * (at your option) any later version. |
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| 11 | * |
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| 12 | * This program is distributed in the hope that it will be useful, |
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| 13 | * but WITHOUT ANY WARRANTY, without even the implied warranty of |
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 15 | * GNU General Public License for more details. |
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| 16 | * |
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| 17 | * You should have received a copy of the GNU General Public License |
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| 18 | * along with this program; if not, write to the Free Software |
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| 19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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| 20 | * |
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| 21 | */ |
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| 22 | #ifndef TRANSPORT_H |
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| 23 | #define TRANSPORT_H |
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| 24 | |
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| 25 | #include <hydrogen/TransportMasterInterface.h> |
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| 26 | |
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| 27 | namespace H2Core |
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| 28 | { |
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| 29 | class TransportPrivate; |
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| 30 | class Song; |
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| 31 | |
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| 32 | /** |
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| 33 | * This is the only transport that Hydrogen shall directly interact with. |
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| 34 | * It shall manage all transport backends (Internal, Jack, whatever). |
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| 35 | * |
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| 36 | * From the sequencer's point of view, it is expected to be used like this: |
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| 37 | * |
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| 38 | * int process(uint32_t nFrames) { |
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| 39 | * TransportPosition pos; // Defined in TransportMasterInterface.h |
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| 40 | * Transport* xport = Transport::get_instance(); |
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| 41 | * xport->get_position(&pos); |
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| 42 | * |
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| 43 | * // Sequence notes based on [Bar:beat.tick] + bbt_offset |
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| 44 | * // and **NOT** based on the frame number. |
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| 45 | * |
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| 46 | * // Tell the transport to move to the next cycle |
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| 47 | * xport->processed_frames(nFrames); |
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| 48 | * } |
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| 49 | */ |
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| 50 | class Transport : public TransportMasterInterface |
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| 51 | { |
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| 52 | public: |
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| 53 | // Singleton access |
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| 54 | static Transport* get_instance(); |
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| 55 | |
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| 56 | // Normal transport controls |
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| 57 | virtual int locate(uint32_t frame); |
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| 58 | virtual int locate(uint32_t bar, uint32_t beat, uint32_t tick); |
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| 59 | virtual void start(void); |
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| 60 | virtual void stop(void); |
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| 61 | virtual void get_position(TransportPosition* pos); |
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| 62 | |
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| 63 | // Interface for sequencer. At the end of process(), declare the number |
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| 64 | // of frames processed. This is needed so that the internal transport |
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| 65 | // master can keep track of time. |
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| 66 | virtual void processed_frames(uint32_t nFrames); |
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| 67 | virtual void set_current_song(Song* s); |
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| 68 | |
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| 69 | // Convenience interface (mostly for GUI) |
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| 70 | virtual uint32_t get_current_frame(void); |
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| 71 | |
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| 72 | // Interface for application (i.e. GUI) |
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| 73 | // * get list of transport models |
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| 74 | // * set current transport model |
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| 75 | // * possibly set parameters on transport models. |
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| 76 | |
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| 77 | private: |
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| 78 | Transport(); |
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| 79 | virtual ~Transport(); |
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| 80 | |
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| 81 | static Transport* _instance; |
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| 82 | TransportPrivate* d; |
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| 83 | }; |
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| 84 | |
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| 85 | |
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| 86 | } |
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| 87 | |
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| 88 | #endif // TRANSPORT_H |
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